
1) Breathing abnormality 2) Dyspnea 3) Dyspnoea
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https://www.crosswordclues.com/clue/orthopnea

Orthopnea or orthopnoea (Greek from ortho, straight + pnoia, breath) is shortness of breath (dyspnea) which occurs when lying flat, causing the person to have to sleep propped up in bed or sitting in a chair. It is the opposite of platypnea. It is commonly seen as a late manifestation of heart failure, resulting from fluid redistribution into the ...
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http://en.wikipedia.org/wiki/Orthopnea

(from the article `cardiovascular disease`) ...extremities (e.g., the legs), large amounts of fluid become mobilized, resulting in rapid expansion of the blood volume and in shortness of ...
Found on
http://www.britannica.com/eb/a-z/o/33

The plight of a person who can only breath easily when sitting straight or standing erect. ... (12 Dec 1998) ...
Found on
http://www.encyclo.co.uk/local/20973

(or″thop-ne´ә) dyspnea that is relieved in the upright position; see also platypnea.
Found on
http://www.encyclo.co.uk/local/21001

Type: Term Pronunciation: ōr′thop-nē′ă, ōr-thop′nē-ă Definitions: 1. Discomfort in breathing that is brought on or aggravated by lying flat.
Found on
http://www.medilexicon.com/medicaldictionary.php?t=63469

Orthopnea: The inability to breathe easily unless one is sitting up straight or standing erect.
Found on
http://www.medterms.com/script/main/art.asp?articlekey=4671

[
n] - form of dyspnea in which the person can breathe comfortably only when standing or sitting erect
Found on
http://www.webdictionary.co.uk/definition.php?query=orthopnea

orthopnea, orthopnoea (British) 1. The ability to breathe easily only in an upright or sitting position or discomfort in breathing which is brought on or aggravated by lying down. 2. Shortness of breath experienced when lying down. 3. Difficult breathing that is partially, or wholly, relieved by an erect sitting or standing position; associated w...
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http://www.wordinfo.info/words/index/info/view_unit/1709/
noun form of dyspnea in which the person can breathe comfortably only when standing or sitting erect; associated with asthma and emphysema and angina pectoris
Found on
https://www.encyclo.co.uk/local/20974

difficult or painful breathing except in an erect sitting or standing position.
Found on
https://www.infoplease.com/dictionary/orthopnea
No exact match found.